A025144 Numbers k such that (#1's in s(1),...,s(k)) = (#1's in r(1),...,r(k)), where s = A025142 and r = A025143.

18, 19, 20, 24, 25, 26, 28, 30, 33, 34, 35, 37, 39, 42, 45, 51, 53, 54, 56, 57, 59, 60, 63, 71, 72, 73, 74, 75, 77, 78, 80, 83, 90, 98, 99, 100, 101, 102, 108, 110, 117, 120, 289, 305, 308, 382, 383, 385, 386, 387, 388, 389, 390, 391, 392, 394, 395, 398, 405, 406, 407, 408, 409, 410

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Links

• Heiko Harborth editor, Probleme und Lösungen, Mathematische Semesterberichte 44, pp. 93-96 (1997). See p. 94.